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The Boostmonster! - 300mm Frankenbike - Worlds Greatest DH Bike?
As the Bike industry goes longer lower slacker, I am going higher, heavier and sendier.
This bike has been a big project I have been working on for quite a while now perfecting and tuning up to my liking.
The 'Boostmonster' is a frankenbike that features a 2005 Norco A-line frame and a 2003 Marzocchi Supermonster 300mm fork.
I also put a larger 10.5x3.5 shock onto it to add to the rear travel, (stock is 9.5x3.0) the rear travel is now about 279mm.
BB height: 423mm
Wheelbase: 1228mm
Front centre: 794mm
Chainstay length: 435mm
Reach: 365mm
Stack: 637mm
RAD: 835mm
64.5 degree headtube angle
Weight 49lbs
The use of the 2005 Norco A-line was not my original idea, I have been talking with bipolarexpress a lot in getting advice on this build, you may have seen some of his articles here in the past.
I am going with 26" wheels for now, but will also try a 24" wheelset soon and really see what I like best for this build.
The 2003 Marzocchi Supermonster is the star of the show
Chromag OSX LTD polished handlebar, Hope Tech 3 V4 brakes, ODI grips with custom engraved lizard skin rings, Chris King headset
Saint Drivetrain 7 speed, hope pro 4 hubs laced to DT Swiss FR 560 rims, STFU system
Stock Truvativ cranks with Straitline pedals and bashguard
I currently have a Fox Van R rear shock and I fit on a 500lb spring. Schwalbe Magic Mary tires (tubeless front, tube rear)
I hired Andrextr to analyse the bike so I could understand how the rear suspension works.
The blue Line in the progression image represents the 9" travel position, and the orange line shows the 8" travel position
We added more rearward wheel movement with the longer shock, which also made the chainstay length a bit shorter
Last year I started this build with a beautiful stock 2005 Norco A-line, see that video here:
It was really fun on Jolly Rancher at Bear mtn, this bike needs really gnarliest trails and big hits!
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You can support what I'm doing on Patreon
Author Info:
Member since Mar 8, 2008
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2 Comments
- 2 0
noakeabean
(May 11, 2022 at 20:55)
This is such a sick bike! Would love to ride it
- 1 0
sharpiemtb
(May 12, 2022 at 4:28)
you need a float x2 in 10.5x3.5.
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